Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... N-Aryl imines from aromatic aldehydes react in benzene with ortho-tertbutylphenoxymagnesium bromide to give 4,4′-arylidenebisphenols through two consencutive para-regiospecific processes whereas N-alkyl imines give mainly ortho-regioselective reactions in the same conditions, ...